judicious choice of the iodoinium source and protecting groups led to an efficient preparation of thymidine dimers having internucleosidic-3′5′)-methylene bonds. The latter procedure was utilized towards the synthesis, in solution and on a solid support, of DNA-fragments containing one or more T-CH2-T dimers. Further, 5′-O-methylthiomethyl-3′-O-methoxyacetyl-N3-benzoyl-thymidine proved to be a suitable
探索了
碘鎓离子促进了适当保护的3'- O-甲
硫基甲基或3' - O-(4-
戊烯-1-氧甲基)-
胸苷与3' - O-甲氧基乙酰基
胸苷的缩合。对
碘鎓源和保护基的明智选择导致有效制备具有核苷间3'5')-亚甲基键的
胸苷二聚体。后一种方法用于在溶液中和在固体支持物上合成含有一个或多个T- CH 2 -T二聚体的DNA片段。此外,事实证明5'- O-甲
硫基甲基-3'- O-甲氧基乙酰基-N 3-苯甲酰基
胸苷是引入5'- O的合适供体。在2,3,4,6-四-O-苄基-
D-葡萄糖,苄基
N-苄氧羰基-L-丝氨酸和
磷酸二苄酯之间的-亚甲基
缩醛键。